public class Example2_4{
  public static void main(String args[]){
    int a[] = {1,2,3,4};
    int b[]={100,200,300};
    System.out.println("数组a的元素个数="+a.length);
    System.out.println("数组b的元素个数="+b.length);
    System.out.println("数组a的=引用"+a);
    System.out.println("数组a的=引用"+a);
    a=b;
    System.out.println("数组a的元素个数="+a.length);
    System.out.println("数组b的元素个数="+b.length);
    System.out.println("a[0]="+a[0]+"a[1]="+a[1]+"a[2]"+a[2]);
    System.out.println("b[0]="+b[0]+"b[1]="+b[1]+"b[2]"+b[2]);
  }
}


